New Features

Feature

Description

New Instance Types

Amazon EC2 now provides two new High-CPU instance types: c1.medium and c1.xlarge. These instance types have a higher CPU to memory ratio and are designed for processing-intensive applications. For more information, refer to the Amazon Elastic Compute Cloud Developer Guide.

AuthorizeSecurityGroupIngress does not allow port ranges for group grants when using the command-line tools or the Query API. This is only supported through the SOAP API.

Elastic IP addresses and existing connections

After a remap of an Elastic IP to an instance, some
preexisting communications (to the old and now unmapped IP address)
might continue to work for some time. Because of the behavior of
some network devices, existing communications (defined as established
source IP, destination IP, port combinations) might continue to
utilize preexisting mappings until the devices refresh their caches.
These connections are not reliable after the remap. You should
reestablish all communications after you remap. We will work
to purge all these caches much more quickly.

Instance type metadata not available in
older AMIs.

The instance-type is only available
as part of the instance metadata on instances that
expose version 2007-09-28 of the instance metadata.
Large and extra large instance types support this
version. Small instances types (the original instance
type) might not support this version yet, in which case
the instance type of m1.small can be assumed. You
can query supported versions using the following URL:
http://169.254.169.254/.

Instance limit

New users are limited to a maximum of 20 concurrent
instances. If you want to run more than 20 instances, please complete
the Amazon
EC2 instance request form and your use case and instance increase
will be considered.

Creation of Paid AMIs is limited

We are currently accepting only a limited
number of partners who will be able to create Paid AMIs.
Users interested in selling their Amazon EC2 AMIs through
this program should send an e-mail to aws@amazon.com.
Please include your name, AWS account ID, company name,
and a detailed description of your AMI.

Console output availability

There were some reports of full console
output not being available. Full console output is only
guaranteed for instances that were rebooted after this
feature was released.